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    <lastBuildDate>Tue, 29 Sep 2026 08:39:38 +0000</lastBuildDate>
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      <title>CVE-2026-42779 — Apache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserializatio…</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-42779</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Apache Software Foundation Apache MINA&lt;/p&gt;
&lt;p&gt;The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description:&lt;/p&gt;
&lt;p&gt;Apache MINA&amp;#39;s AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed.&lt;/p&gt;
&lt;p&gt;The fix checks if the class is present in the accepted class filter before calling Class.forName().&lt;/p&gt;
&lt;p&gt;Affected versions are Apache MINA 2.1.0 &amp;lt;= 2.1.11, and 2.2.0 &amp;lt;= 2.2.6.&lt;/p&gt;
&lt;p&gt;The problem is resolved in Apache MINA 2.1.12, and 2.2.7 by 
applying the classname allowlist earlier.&lt;/p&gt;
&lt;p&gt;Affected are applications using Apache MINA that call  IoBuffer.getObject().&lt;/p&gt;
&lt;p&gt;Applications using Apache MINA are advised to upgrade.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Apache Software Foundation Apache MINA&lt;/p&gt;
&lt;p&gt;The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description:&lt;/p&gt;
&lt;p&gt;Apache MINA&amp;#39;s AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed.&lt;/p&gt;
&lt;p&gt;The fix checks if the class is present in the accepted class filter before calling Class.forName().&lt;/p&gt;
&lt;p&gt;Affected versions are Apache MINA 2.1.0 &amp;lt;= 2.1.11, and 2.2.0 &amp;lt;= 2.2.6.&lt;/p&gt;
&lt;p&gt;The problem is resolved in Apache MINA 2.1.12, and 2.2.7 by 
applying the classname allowlist earlier.&lt;/p&gt;
&lt;p&gt;Affected are applications using Apache MINA that call  IoBuffer.getObject().&lt;/p&gt;
&lt;p&gt;Applications using Apache MINA are advised to upgrade.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-42779</guid>
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